Hi David,
For PDB output, ChimeraX should output SEQRES records for each chain as long as either: (A) the chain had sequence information in the original input file (e.g. SEQRES records), or (B) the chain has no missing-structure pseudobonds.
I not the author of the mmCIF I/O part of ChimeraX, but I believe the criteria is different in that the chain has to have its "full_sequence_known" attribute set to true.  You can do this "by hand" with the command (assuming your structure is model #1) "setattr #1 chains full_sequence_known true".

--Eric

Eric Pettersen
UCSF Computer Graphics Lab

P.S.  There are different lists for Chimera vs. ChimeraX questions.  I have cc'ed the ChimeraX list on this.

On Nov 6, 2024, at 10:54 AM, David Bhella via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Dear Chimera/ChimeraX team,
 
I have a model for an asymmetric unit of a virus capsid that has three chains of the same capsid protein – but I am having trouble depositing my model in the PDB because it only has a seqres entry for one of the three chains (B). Whatever I do, chimeraX will only write entries for that chain. Is there a way to force chimeraX (or any other program) to write the seqres card for each chain correctly?
 
Thanks
D
 
David Bhella
Professor of Structural Virology
Director, Scottish Centre for Macromolecular Imaging
Associate Director, MRC - University of Glasgow Centre for Virus Research

+44 (0)141 330 3685

 

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